treski,
Please don't get down on yourself. I only wish I had your problems. No on second thought I really don't need anymore than the 13 I already have, and I too still have 4 to pay off.
Oh well guess thats the price for being a mushroom about my credit for 15 yrs. It is a long hill to climb but you will make it and so will I. It will just take me a little longer 
When all else fails; tie a knot in the end of your rope and hang on tight.
I felt exactly how you feel a year ago. I had bad credit, about the same number of baddies (which varied depending on C.R) and a judgement. I was at about 550 and am now in the 600's. My best score is 655 with Experian and my others are 608 and 601.
It's so easy to mess up our scores but it takes so much more work to fix them. It's like making money, it's harder to earn but so easy to spend. C.R. is hard to fix but easy to damage.
I walk around with the list of my baddies in my wallet with the dates each is supposed to fall off. Knowing that at some point those things will fall off encourages me that I'm on the right track. I've had over a year of zero lates and continue to pay my bills on time; even if it's a minimum payment to keep me on track, then a hefty payment the following month.
Also, keep the credit cards at home as most advise. It's easy to use it in your wallet but if it's at home you are less likely to fetch it unless the item you want is really needed; the impulse dies down by the time you get home to fetch the card. 
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I understand how frustrating it can be, but do yourself a big favor and don't give up. It sometimes seems so slow on progress. But it will happen! Focus on the task result and focus even harder on where you want to be!
Honestly, I think the number and the types of baddies on my reports are worse than many on these boards. And I've come from the 400's to 2 scores in the 600's. Not great---but BIG improvement!
Perserverance!!!
Try 3 fed and 2 state tax liens, 2 judgements, 2 co's, and 19 lates. Clean for 20 months, but getting there...
We're all here to support and encourage you! 
EQ 817, EX 815, TU 813 (Updated 1/5/18: TU 843